In any action involving an attack on a determination by a governmental agency relative to the requirement or the absence of the requirement, or the adequacy of a "detailed statement", the decision of the governmental agency shall be accorded substantial weight.
RCW 43.21C.090
Decision of governmental agency to be accorded substantial weight.
Known as the State Environmental Policy Act
The act spans §§ 43–43 (74 sections).
Applied in 49 court decisions — leading case 84 Wash. 2d 271 - Leschi Improvement Council v. Washington State Highway Commission (1974)
Most recently applied in Heritage Baptist Church v. Central Puget Sound Growth Management (March 2018)
1973 1st ex.s. c 179 s 3.
How often courts cite this section
Court decisions citing this, by year. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.